SharePoint Designer: Creating an ongoing discussion form automatically....

Hi,

I am new to SharePoint designer, I can't seem to be able to create workflow that creates a new ongoing discussion form upon a file upload. Here are the steps I want to accomplish.

1 - User A uploads a file. 

2 - A discussion form automatically created to discuss the content of the file.

3-  User B receives an email with the file link and a link to a discussion form

4 - User B add comments in the discussion form

5 - User C receives an email with the link to the discussion threat to read and reply to the comment.

6 - when user C add comments Users B receives email about the comments. 

Please shed some lights or provide the right components I should be using.

Thanks,

Leo